Means for soundproofing gear mechanisms



H. FORD Filed Abril 22. 1926 Aug. 9,1927.

MEANS FOR SOUNDPROOFING GEAR MECHANIS-MS u 4Patentedl Aug. -9', 1.927. i

UNITED STATES HENRY' man. or'nnamaoma, meinem.

MEANS FOB SOUNDPROOFING GEAR MECHANISHE Application mea ala-1122,19. sei-mso. 103,954.

My invention relates to meansV for soundproofing gear mechanisms and has for its object to reduce the noise incident' to the .operation of gears which are not wholly 11nmersed in oil while in operation. I accom- 'lish this ob'ect by the means hereinafter escribed an illustratedin 'the accompanyindra'wings, in which:

ig. 1 is a section through a cam-shaft 10, of a motor vehicle and a timing gearmounte'd onthe end 6thereof.

Fig. 2 is a sectiontaken on Fig. 1.

In the accompanying drawings reference numerals are employed to indicate the several parts. 1 is a cam-shaft whichmaybe of the type in eneral use for suchv purpose, 2 is a babbitt sieeve on which is mounted a bearing 3 which in turn is supported 1n an aperture produced in the web 4 of the cylinder-block. 5 is a ange' on the cam-Shaft. 6 is aV gear-ring on the outer periphery of which lare ear-teeth Thev gear-ring 1s secured to't e cam-shaft by means of a pin 8 whichV forms the driving engagement for the gear. The gear-rlng- 1s provided with a series of bosses 9 in whlch are screw-thread ed apertures 10.I .A plate 11 is adapted to t one face of the gear-ring and 1s secured 8 0 thereto by means of bolts 12 and also by the nut 13 which passes partially through an aertur'e inthe center of the plate and istightened a inst theplate by means of .its screw-threa ed connection with the end Iof the $5 cam-shaft. The gear-rin thus constructed is hollow and has a re atively thin 'wall and forms a Huid-tight compartment for receiving and holding 1n contact with its walls constituting the body 'of the gear-ring, a` v4I) iiuid such as 'oil' or other 'liquid substances.

,.In the cam-shaft I provides. canal l@ which is fed under pressure with oil 'from a suitable source o supply. 4From this canal is a lead 15 which A'carries oil tothe cam-shaft 4l bearing, and a lead .16 in the 'cam-shaft com-- municates with the-hollow portion of .tle

-bear A april, 1926.(

gear-ring and permits the oil to be forced into the 'gear-ung until the latter is completely filled vwith oil, 17. It is thus seen that the body of the gear-ring is at all vtimes in contact with a body of oil.

Now I have discovered that if you cause a body of oilto contact .with the parts of *a i I gear-ring which carries the gear-teeth, though not with the teeth, the noise which otherwise accompanies'the operation of the gear will be ygreatly reduced, and have y illu'si trated and described one way of constructing a ar so that a body of oil, iiuid or semiiu1d substance may -be utilized to accomplish the aforesaid result.'

Having fully described my invention and its mode of operation, whatI claim is:

1. In a device of the class described, a shaft having a flange'spaced from one end` thereof, a gear ring mounted on said flange, a plate secured to one side of said gear ring v and adapted to form a fluid compartment therewit and a nut threaded to said shaft to form a combined closure -and lockingmember whereby thel gear assembly may tight compartment for a sound d will be held from deadenmg liquid an movement ax'lally of the shaft.

c 2. Ina device of the classdescribed, a 7:, .A

shaft having a flange spaced from one end Athereofandan oil canal therein terminating in an outlet lead adjacent to said flange, a gear rm mounted on said flange, a plate secured ,to one side of said gearv rmg and adapted o form a compartment therewith,

t threaded to the y shaft to thereby v gainst theplateto form a combined locking and sealing member, whereby the gear. assemblymayjorm'a fluid tight 'come partmentV for a sound deadening liqudand vlillftbe held from j movement axiallyof the 8 8 Signed atthe of Dearbormcountyof Wayne; State dci-thy FORD.

this' 15th day of 

